Plank trusses as material-saving timber structures in high modernism

板桁架作为高度现代主义中节省材料的木结构

• 批准号: 442247912
• 负责人: Dr.-Ing. Iris Engelmann
• 金额: --
• 依托单位: Professur Denkmalpflege und Baugeschichte
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/442247912?language=en
• 关键词: Plank; trusses; material; saving; timber

Timber Engineering has been developed during the High modernism period as a specified discipline in engineering. The pre-requirements therefor were a fundamental understanding of the mechanical behaviour of the material and of the connections based on scientific re-search on one side and the development of wood-based materials and high-performance connections based on innovative ideas on the other side. Somehow in the shadow of the relatively well studied Glulam technology stands the technology of connecting single planks by use of nails and bolts into plank truss girders. These structural elements found their ex-ample mainly in the I-beams and trussed girders which had been well known in the end of the 19th century from steel structures. Until now construction history has not been studied and documented systematically for this type of construction. Furthermore it could be detected that the state-of-the-art in terms of engineering methods fot the calculation of shear loaded fasteners does not always describe the load-displacement behaviour correctly. This leads to a lack o knowledge on the engineering side, if different types of plank truss girders should be checked for efficiency and structural quality. Both points are addressed by the proposed research project. An interdisciplinary team will work on methods and criteria to register and classify on one and to recognise, evaluate and asses on the other. In this context 12 work-packages had been defined and arranged into two groups. In a first step A categories for systematization of structures will first be developed and than applied to identify about four reference projects. The categories are based on a comprehensive study regarding material-saving construction, historical research reports, construction practice and technical codes. In a second step B categories for rating the values of structures in terms of cultural heritage will be developed and applied to the reference objects. All relevant results should become part of a more general guideline about assessment and evaluation of historical structures which can be assigned to the period of High modernism.The research project should be carried out in cooperation by two scientists one educated in cultural heritage the other in structural engineering. All working packages are closely linked together within the project. Beyond that it is aimed for a wider cooperation within the SPP. Topics which are of special interest are "Competition of Engineers", "Digital Modelling", "Pro-tection of knowledge, technology an process" as well as "Detection based on aerial photography". State offices for historical monuments from four different states stated interest in the topic "plank truss girders" and confirmed their support.

木材工程是在高度现代主义时期发展起来的一门工程学科。其先决条件是一方面对材料的机械性能和基于科学研究的连接有基本的了解，另一方面基于创新理念开发木基材料和高性能连接。不知何故，在相对较好地研究了胶合技术的阴影下，出现了一种通过使用钉子和螺栓将单板连接成板桁架梁的技术。这些结构元件主要以工字梁和桁架梁为例，它们在世纪末的钢结构中广为人知。到目前为止，还没有对这种类型的建筑进行系统的研究和记录。此外，可以发现，在计算受剪切载荷的紧固件的工程方法方面的最新技术并不总是正确地描述载荷-位移行为。这导致缺乏对工程方面的知识，如果不同类型的板桁架梁应检查效率和结构质量。这两个问题都在拟议的研究项目中得到了解决。一个跨学科小组将研究方法和标准，对一个进行登记和分类，对另一个进行识别、评估和评估。在这方面，确定了12个工作包，并将其分为两组。在第一步中，将首先开发结构系统化的A类，然后应用于确定大约四个参考项目。这些类别是基于对节省材料的建筑、历史研究报告、建筑实践和技术规范的全面研究。在第二步中，根据文化遗产对结构的价值进行评级的B类将被开发并应用于参考对象。所有相关的结果应该成为一个更普遍的指导方针的一部分，评估和评价的历史结构，可以分配到高现代主义时期。研究项目应该由两个科学家合作进行，一个在文化遗产教育，另一个在结构工程。所有的工作包在项目中都是紧密联系在一起的。除此之外，它还旨在扩大最高人民检察院内部的合作。特别有趣的题目是“工程师的竞争”，“数字模型”，“知识，技术和过程的保护”以及“基于航空摄影的检测”。来自四个不同州的国家历史古迹办公室表示对“木板桁架梁”这一主题感兴趣，并证实了他们的支持。